chewie crashed after play a few video

after play a few videos, chewie will crashed with errors as follow:

```
D/SurfaceUtils( 9431): connecting to surface 0x78e7d008, reason connectToSurface
I/MediaCodec( 9431): [OMX.google.h264.decoder] setting surface generation to 9657373
D/SurfaceUtils( 9431): disconnecting from surface 0x78e7d008, reason connectToSurface(reconnect)
D/SurfaceUtils( 9431): connecting to surface 0x78e7d008, reason connectToSurface(reconnect)
E/ACodec ( 9431): [OMX.google.h264.decoder] setPortMode on output to DynamicANWBuffer failed w/ err -1010
I/ACodec ( 9431): codec does not support config priority (err -1010)
I/OMXClient( 9431): Treble IOmx obtained
I/ACodec ( 9431): codec does not support config priority (err -2147483648)
I/OMXClient( 9431): Treble IOmx obtained
D/SurfaceUtils( 9431): connecting to surface 0x82a7a008, reason connectToSurface
I/MediaCodec( 9431): [OMX.google.h264.decoder] setting surface generation to 9657374
D/SurfaceUtils( 9431): disconnecting from surface 0x82a7a008, reason connectToSurface(reconnect)
D/SurfaceUtils( 9431): connecting to surface 0x82a7a008, reason connectToSurface(reconnect)
E/ACodec ( 9431): [OMX.google.h264.decoder] setPortMode on output to DynamicANWBuffer failed w/ err -1010
I/ACodec ( 9431): codec does not support config priority (err -1010)
E/AudioTrack( 9431): AudioFlinger could not create track, status: -12
E/AudioTrack-JNI( 9431): Error -12 initializing AudioTrack
E/android.media.AudioTrack( 9431): Error code -20 when initializing AudioTrack.
I/OMXClient( 9431): Treble IOmx obtained
E/ExoPlayerImplInternal( 9431): Playback error.
E/ExoPlayerImplInternal( 9431): com.google.android.exoplayer2.ExoPlaybackException: com.google.android.exoplayer2.audio.AudioSink$InitializationException: AudioTrack init failed: 0, Config(44100, 12, 44100)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.audio.MediaCodecAudioRenderer.processOutputBuffer(MediaCodecAudioRenderer.java:646)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.drainOutputBuffer(MediaCodecRenderer.java:1355)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.render(MediaCodecRenderer.java:663)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.ExoPlayerImplInternal.doSomeWork(ExoPlayerImplInternal.java:529)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:300)
E/ExoPlayerImplInternal( 9431): at android.os.Handler.dispatchMessage(Handler.java:101)
E/ExoPlayerImplInternal( 9431): at android.os.Looper.loop(Looper.java:164)
E/ExoPlayerImplInternal( 9431): at android.os.HandlerThread.run(HandlerThread.java:65)
E/ExoPlayerImplInternal( 9431): Caused by: com.google.android.exoplayer2.audio.AudioSink$InitializationException: AudioTrack init failed: 0, Config(44100, 12, 44100)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.audio.DefaultAudioSink.initializeAudioTrack(DefaultAudioSink.java:1128)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.audio.DefaultAudioSink.initialize(DefaultAudioSink.java:532)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.audio.DefaultAudioSink.handleBuffer(DefaultAudioSink.java:593)
E/ExoPlayerImplInternal( 9431): at com.google.android.exoplayer2.audio.MediaCodecAudioRenderer.processOutputBuffer(MediaCodecAudioRenderer.java:640)
E/ExoPlayerImplInternal( 9431): ... 7 more
```

this is my code:

```dart
import 'package:video_player/video_player.dart';
import 'package:chewie/chewie.dart';
import 'package:flutter/material.dart';
import 'package:my_news/model/index.dart';

class ShortVideo extends StatefulWidget {
ShortVideo(this.sampleInfo);

final NewSample sampleInfo;

@override
_ShortVideoState createState() => _ShortVideoState();
}

class _ShortVideoState extends State {
VideoPlayerController _controller;

ChewieController _chewieController;

@override
void initState() {
super.initState();
try{
_controller = VideoPlayerController.network(widget.sampleInfo.videoList[0])
..initialize().then((_) {
// Ensure the first frame is shown after the video is initialized, even before the play button has been pressed.
setState(() {});
});
_chewieController = new ChewieController(
videoPlayerController: _controller,
aspectRatio: 9 / 16,
autoPlay: true,
looping: true,
showControls: true,
// 占位图
placeholder: new Container(
color: Colors.grey,
),

// 是否在 UI 构建的时候就加载视频
autoInitialize: !true,

// 拖动条样式颜色
materialProgressColors: new ChewieProgressColors(
playedColor: Colors.red,
handleColor: Colors.blue,
backgroundColor: Colors.grey,
bufferedColor: Colors.lightGreen,
),
);
}catch(e){
print('error ---------------');
}

}

@override
Widget build(BuildContext context) {
return Scaffold(
// appBar: new AppBar(title: new Text(widget.sampleInfo.title)),
body: Center(
child: new Chewie(
controller: _chewieController,
)));
}

@override
void dispose() {
_controller.dispose();
_chewieController.dispose();
super.dispose();
}
}
```

version:

```
chewie: 0.9.8
video_player: ">=0.7.0 <0.11.0"
```

Start with the ShortVideo widget shown in the report and reproduce the failure by playing several videos on Android with Chewie 0.9.8 and the stated video_player range. Compare the playback and disposal lifecycle with the reported ExoPlayer AudioTrack errors; done means repeated playback no longer crashes.

Written by the indexing model from the issue text.